Finding your team
Players know one another on the grid. People can just start inviting others to be part of their team. PM people. Use clans if need be.
What is important, is that everyone knows which team they are in. 8 players, with a team name. That's all that is needed to prepare for the big day.
See Team List.
Space on the forums, as well as PM's and emails, can provide players with ways of getting into teams, inviting others onto teams etc. Of course, most of the time, teams will be formed by people meeting on the grid. Experienced players will have already determined their prefered team partners and their prefered positions, however they may have several options. As new players enter, and as they learn to play the game, they will form relationships with other new players and the formation of teams is half-way there.